If want you are doing is legal I wouldn't worry about it, if they keep it up file a restraining order....if it's not you might have a problem.
If someone is bugging you on EP block them and move on....Why waste time?
Ive made it my mission to find out what is wrong with them, if they are sick or evil.
Protect yourself in every way possible. Don't trust anyone. If someone claims to be your friend, keep them at arm's length and do not reveal any personal information.
I ignore them mostly.
I hide from them and argue with them on the internet